Handcent Text Bubble Control

Hello, I have it set up to where my text bubbles in handcent are a certain color, but for some reason it keeps resetting back to the default colors. For example, I am texting with someone, I change the settings to the color scheme I like, but then someone else texts me, and that thread of texts from the new person goes back to the default color. Is there any way to make my color changes permanent for all future threads?